CAJ | 학술논문

　　继电保护系统是电力系统安全稳定运行的第一道防线，研究其可靠性具有重要意义。目前继电保护可靠性研究主要从保护的拒动和误动方面进行分析，对数据样本相对较多的缺陷数据却没有有效利用。在对保护装置的缺陷信息进行分类预处理的基础上，应用最小二乘法估计二参数威布尔分布的参数，进一步得到基于缺陷信息的可靠度函数及失效率函数等并进行了相关分析。算例表明，通过计算威布尔分布的相关参数并分析可靠度、失效率及平均故障间隔时间等可靠性指标，能为分析继电保护装置的缺陷规律及可靠性评估提供一定的参考。
　　계전보호계통시전력계통안전은정운행적제일도방선，연구기가고성구유중요의의。목전계전보호가고성연구주요종보호적거동화오동방면진행분석，대수거양본상대교다적결함수거각몰유유효이용。재대보호장치적결함신식진행분류예처리적기출상，응용최소이승법고계이삼수위포이분포적삼수，진일보득도기우결함신식적가고도함수급실효솔함수등병진행료상관분석。산례표명，통과계산위포이분포적상관삼수병분석가고도、실효솔급평균고장간격시간등가고성지표，능위분석계전보호장치적결함규률급가고성평고제공일정적삼고。
Protection system is the first defense line to ensure the safe operation of power grid, so it is of great significance to study its reliability. Currently, the reliability research of protection system mainly focuses on misoperation and fail-to-operation, yet it does not effectively take advantage of defect information which would occur in great probability. This paper analyzes defect information of protection devices and estimates the parameters of two-parameter Weibull distribution as well as the reliability function, failure rate function and so on. The study case shows that it can supply reference for further reliability assessment of protection systems by calculating the parameters of Weibull distribution and analyzing indices such as reliability, failure rate, and mean time between failures. <br> This work is supported by National Natural Science Foundation of China (No. 50837002).